diff options
Diffstat (limited to 'clang/lib/Basic/Targets/AArch64.cpp')
| -rw-r--r-- | clang/lib/Basic/Targets/AArch64.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/clang/lib/Basic/Targets/AArch64.cpp b/clang/lib/Basic/Targets/AArch64.cpp index d61a6f4938b..120a0e2d4e8 100644 --- a/clang/lib/Basic/Targets/AArch64.cpp +++ b/clang/lib/Basic/Targets/AArch64.cpp @@ -551,6 +551,23 @@ MicrosoftARM64TargetInfo::getCallingConvKind(bool ClangABICompat4) const { return CCK_MicrosoftWin64; } +unsigned MicrosoftARM64TargetInfo::getMinGlobalAlign(uint64_t TypeSize) const { + unsigned Align = WindowsARM64TargetInfo::getMinGlobalAlign(TypeSize); + + // MSVC does size based alignment for arm64 based on alignment section in + // below document, replicate that to keep alignment consistent with object + // files compiled by MSVC. + // https://docs.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions + if (TypeSize >= 512) { // TypeSize >= 64 bytes + Align = std::max(Align, 128u); // align type at least 16 bytes + } else if (TypeSize >= 64) { // TypeSize >= 8 bytes + Align = std::max(Align, 64u); // align type at least 8 butes + } else if (TypeSize >= 16) { // TypeSize >= 2 bytes + Align = std::max(Align, 32u); // align type at least 4 bytes + } + return Align; +} + MinGWARM64TargetInfo::MinGWARM64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts) : WindowsARM64TargetInfo(Triple, Opts) { |
